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LittleBill
join:2013-05-24

LittleBill

Member

light sabers unite!, crazy loco m5 question

i have an odd install.

house to garage less then 500 yards, 0 LOS

if i arch them both straight into the sky aimed toward each other is there 1% chance its going to work?

just curious if anyone has tried this, im going to give it a shot regardless

WHT
join:2010-03-26
Rosston, TX

WHT

Member

RF propagation doesn't work that way.
said by LittleBill:

if i arch them both straight into the sky aimed toward each other is there 1% chance its going to work?

LLigetfa
join:2006-05-15
Fort Frances, ON

LLigetfa

Member

said by WHT:

RF propagation doesn't work that way.

Certainly not at 5GHz. What is between the house and garage?

Inssomniak
The Glitch
Premium Member
join:2005-04-06
Cayuga, ON

Inssomniak to LittleBill

Premium Member

to LittleBill
500 yards, why not try 2.4ghz? Whats in the way?
LittleBill
join:2013-05-24

LittleBill

Member

7 houses,

have the equipment. figured it was a long shot
wispclimber
join:2013-06-29

wispclimber to LittleBill

Member

to LittleBill
I would not say impossible but tricky.
There are many things in rf that dont make sense but work.
If you have the gear why not.

»en.wikipedia.org/wiki/Kn ··· e_effect
Porch
join:2005-06-19

Porch to LittleBill

Member

to LittleBill
Have someone stand with a flash light at your house, point it at the sky. Do the same at the garage and "cross the streams". Notice you don't get any extra light at the house or the garage.

You didn't say what is blocking the view. If it's trees, then a 900Mz radio might work at that low of range.
LittleBill
join:2013-05-24

LittleBill

Member

i don't think this is a good anology, i can point 2 radio's in opposite directions and still pickup the signal

i will try and let people know the outcome

WHT
join:2010-03-26
Rosston, TX

WHT to Porch

Member

to Porch
said by Porch:

Notice you don't get any extra light at the house or the garage.

That's a perfect description. If I wasn't driving, I would have said the same thing.
WHT

WHT to LittleBill

Member

to LittleBill
said by LittleBill:

i can point 2 radio's in opposite directions and still pickup the signal

That's because you're either picking up reflections or a small amount off the backside of the radio.
switchman
join:1999-11-06
ARRIS SB6183
(Software) OPNsense

2 edits

switchman to WHT

Member

to WHT
said by WHT:

RF propagation doesn't work that way.

said by LittleBill:

if i arch them both straight into the sky aimed toward each other is there 1% chance its going to work?

Actually it can. »en.wikipedia.org/wiki/Tr ··· _scatter. But I agree in the OP application, it cannot.

Many years ago, I worked on a tropo system. We had duel 90ft billboards antennas running both polarization and space diversity. Tx power was ~6KW even though the system was designed for 10KW.

»commondatastorage.google ··· 0472.jpg
»static.panoramio.com/pho ··· 8693.jpg
»commondatastorage.google ··· 1197.jpg

Also worked on the TRC-97, »en.wikipedia.org/wiki/AN/TRC-97. Ours was the 24 channel version.
Porch
join:2005-06-19

Porch to LittleBill

Member

to LittleBill
That's because there is always some leakage around the antenna. A flashlight, even pointed down the street, will light up your feet as the reflector is not prefect.

I have several NSLM5 pointing at the side and back of another NSM5. It's not ideal, but works due to them being so close.

Frankly, I am wondering if this idea of a radio having the ability to reach out and redirect radio waves back to it comes from the crap that is on TV.


LittleBill
join:2013-05-24

LittleBill

Member

eh i see what you guys are saying,

maybe i will try the light saber,

but HF works in very weird ways when u can talk around the world

maybe i will aim both of them at the same building
Porch
join:2005-06-19

Porch

Member

Radio waves are really well understood. The lower frequencies have a much longer wavelength, so smaller things don't tend to block them as much. Also "around the word" communication takes many more watts then we are allowed to use for 802.11.

You can try to aim then both at the same building and bounce the signal off it, and it will work. However, the signal loss will be huge. Getting an acceptable signal to be useful, is the key.